Railway-signal



(No Model.)

H. H. LIEMKE.

A RAILWAY SIGNAL. No. 346,484. Patented Aug. 3, 1886.

u Penas Pham Lixhogmphcf, washmgmn, nA cA NITE fl? HERMAN H. LIEMKE, OFST. LOUIS, MISSOURI.

RAILWAY-SIGNAL.

SPECIFICATION forming part of Letters Patent No, 346,484, dated August3, 1886.

Application filed September 31, 1885.

To aZZ whom it 11mg/ concern:

Be it known that I, HERMAN H. LIEMKE, of the city of St. Louis, in theState of Missouri, have invented a certain new and useful I1nprovenientin Railway-Signals, of which the following is a full. clear, and exactdescription, reference being had to th e accompanying' drawings,form-ing part of t-his specification, and in which- Figure l is a detailtop View illustrating my improved device. Fig. 2 is a side elevation.Fig. 3 is a similar View to Fig. 2, showing the parts in differentpositions. Fig. 4 is a detail vertical section taken onlinetd, Fig. l.Fig. 5 is an enlarged detail View, showing the connection between thebell-crank lever and the end of the tie. Fig. 6 is an elevation of thetie and a crosssection of the rails of the track.

This invention relates to an improvement in electric railway-signals,intended more particularly for crossings; and it consists in features ofnovelty hereinafter fully described, and pointed out in the claims.

Referring to the drawings, A represents part of the rails of arailway-track, and B one of the ties, one end of which is supported by aspiral or other spring, G. To this end of the tie is secured a short armor pin, D, that bears upon one member of a bell-crank lever, E, pivoted,by a bracket, F, to a support, G. The other end of the bell-crank leveris connected by a wire, H, to a bolt, I, that is supported by a bracket,J, and that passes through an arm, K, secured to another tie, B, of thetrack. It is also supported at one end upon a spiral spring, C. The boltI is surrounded by a spiral spring, L, the tendency of which is to holdthe bolt in its inward position, as shown in Fig. 4. The arm K has aprojection, K', in which the bolt ts and works, and it is slotted toreceive the inner end of a bar or lever, M, pivoted to it by a pin, N,and connected to it by the bolt, and having a hole or socket to receivethe bolt I when the bolt is in its inward position. Thus when the boltis in its inward position this bar M is rigidly secured to the arm K bythe bolt and the pivot-pin N.

` Under the outer end of the bar M is a spiral spring, O, which tends tohold this bar in its upper position, as shown in Fig. 2. O11 the outerend of the arm M is a metallic pin, P,

Serial Xo. 1717-12. (No modem which extends downward into a pot, Q,partly filled with mercury, and connected to this pin is one wire of theelectric circuit It, the other wire being connected to the mercury-cupand extending into the mercury by means of an arm, T. The wire S or Rextends to an electric-alarm device-such as, for instance, the One shownin my application filed June 8, 1885, No. 168,016.

The operation is as follows: Supp'osing a train would be going in thedirection shown by the arrow, Fig. l, it first depresses the tie B andforces the arm K and bar M downward, causing the pin I to enter themercury in the cup, and thus closes the electric circuit and sounds thealarm. As the train passes on', it depresses the tie B and retracts thebolt I from the bar l\I,t-hrough means of the described connection E Hbetween the bolt and the tie. The upward movement ofthe arm K will notcause the upward movement ofthe bar M, as the bar will turn cuits pivotN. The outer end of the bar M will be gradually raised or lifted to itsnormal position by the spring O from the position shown by dotted lines,Fig. 2, to that shown by full lines, and when it is thus raised theelectric circuit is broken. The relatively slow rising of the bar M isin the form of the invention here shown, owing to the fact that thespring O is of less strength in proportion to the weight to be liftedthan the spring-O. The ties B B may be adjacent or within a few feet onefrom the other. The object of form` ing this connection between the armK and bar M is to allow the latter' to be raised slowly and the pin l?to be raised as slowly from the mercury, so that the electric circuit isnot broken so quickly and the alarm is sounded much longer than wouldotherwise be the case. As soon as the bar is raised to its normalposition, the bolt I is caused to recede again by the spring L, andenters the hole in the bar M, so the bar is depressed the next time thetrain comes along, the same as already described. Vhen the train isgoing in the opposite direction to that shown by the arrow, Fig. l, thetie B being iirst run over causes the pin I to be retracted from the armM, so that when the tie B is run over the depressing of this latter tiewill not force the pin l? intothe mercury, but the parts will assume theposition shown in IOO M, pivoted to the arm, pin I?, bar B, contact;-

onp Q, Wires S and R, spring O, substantially' as described, for thepurpose seb forth.

l 3. The combination of tie B, arm K, bar M, pivoted to the arm, springO, contact-cup Q, pinI), Wires S and R, bolt I, Wire H, bell-crank leverE, and spring above the be11erank1eve1, substantially as and for thepurpose seb forth.

HERMAN I-I. LIEMKE. In presence of- G-Eo. I-I. KNIGHT, SAML. KNIGHT.

